<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图 -->
    <el-card>
      <el-row>
        <el-col>
          <el-button type="primary" @click="addRoleList">添加角色</el-button>
        </el-col>
      </el-row>

      <!-- 角色列表区域 -->
      <el-table :data="roleList" border stripe>
        <!-- 展开列 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row
              :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']"
              :key="item1.id"
              v-for="(item1, i1) in scope.row.children"
            >
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag
                  closable
                  @close="removeRightById(scope.row, item1.id)"
                  >{{ item1.authName }}</el-tag
                >
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二级和三级权限 -->
              <el-col :span="19">
                <!-- 通过 for 循环 嵌套渲染二级权限 -->
                <el-row
                  :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']"
                  :key="item2.id"
                  v-for="(item2, i2) in item1.children"
                >
                  <el-col :span="6">
                    <el-tag
                      type="success"
                      closable
                      @close="removeRightById(scope.row, item2.id)"
                      >{{ item2.authName }}</el-tag
                    >
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="13">
                    <el-tag
                      type="warning"
                      :key="item3.id"
                      v-for="item3 in item2.children"
                      closable
                      @close="removeRightById(scope.row, item3.id)"
                      >{{ item3.authName }}</el-tag
                    >
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column label="#" type="index"> </el-table-column>
        <el-table-column label="角色名称" prop="roleName"> </el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"> </el-table-column>
        <el-table-column label="操作" width="300px">
          <template slot-scope="scope">
            <el-button
              type="primary"
              icon="el-icon-edit"
              size="mini"
              @click="showEditRoleList(scope.row.id)"
              >编辑</el-button
            >
            <el-button
              type="danger"
              icon="el-icon-delete"
              size="mini"
              @click="removeRoleList(scope.row.id)"
              >删除</el-button
            >
            <el-button
              type="warning"
              icon="el-icon-setting"
              size="mini"
              @click="showSetRightDialog(scope.row)"
              >分配权限</el-button
            >
          </template>
        </el-table-column>
      </el-table>
    </el-card>

    <!-- 添加角色区域 -->
    <el-dialog
      title="添加用户"
      :visible.sync="addDialogVisible"
      width="50%"
      @close="addDialogClosed"
    >
      <!-- 内容主体区域 -->
      <el-form
        :model="addForm"
        :rules="addFormRules"
        ref="addFormRef"
        label-width="80px"
      >
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="addForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="addForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <!-- 底部区域 -->
      <span slot="footer" class="dialog-footer">
        <el-button @click="addDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addRole">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 修改角色区域 -->
    <el-dialog
      title="修改用户"
      :visible.sync="editDialogVisible"
      width="50%"
      @close="editDialogClosed"
    >
      <el-form
        :model="editForm"
        :rules="editFormRules"
        ref="editFormRef"
        label-width="70px"
      >
        <el-form-item label="角色名称">
          <el-input v-model="editForm.roleName" disabled></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="editForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editRoleInfo">修改</el-button>
      </span>
    </el-dialog>
    <!-- 分配权限对话框 -->
    <el-dialog
      title="分配权限"
      :visible.sync="setRightDialogVisible"
      width="50%"
      @close="setRightDialogClosed"
    >
      <!-- 树形控件 -->
      <el-tree
        :data="rightsList"
        :props="treeProps"
        show-checkbox
        node-key="id"
        default-expand-all
        :default-checked-keys="defKeys"
        ref="treeRef"
      ></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      // 所有角色的列表数据
      roleList: [],
      //   提交的表单
      addForm: {
        roleName: '',
        roleDesc: ''
      },
      //   表单添加时的验证规则
      addFormRules: {
        roleName: [
          { required: true, message: '请输入角色名', trigger: 'blur' },
          {
            min: 2,
            max: 10,
            message: '角色名长度在3~10个字符之间',
            trigger: 'blur'
          }
        ],
        roleDesc: {
          min: 2,
          max: 30,
          message: '角色描述在2~30个字符之间',
          trigger: 'blur'
        }
      },
      //   显示或隐藏添加用户对话框
      addDialogVisible: false,
      //   显示或隐藏修改用户对话框
      editDialogVisible: false,
      // 显示或隐藏修改权限对话框
      setRightDialogVisible: false,
      //   查询到的角色列表数据
      editForm: {},
      //   验证修改的表单规则
      editFormRules: {
        roleDesc: {
          min: 2,
          max: 30,
          message: '角色描述在2~30个字符之间',
          trigger: 'blur'
        }
      },
      // 所有权限数据
      rightsList: [],
      // 树形控件的属性绑定对象
      treeProps: {
        label: 'authName',
        children: 'children'
      },
      // 默认选中的节点id值数组
      defKeys: [],
      // 当前即将分配权限的角色id
      roleId: ''
    }
  },
  created() {
    this.getRoleList()
  },
  methods: {
    // 获取所有角色的列表
    async getRoleList() {
      const { data: res } = await this.axios.get('roles')
      if (res.meta.status !== 200) {
        this.$message.error('获取角色列表失败')
      }
      this.roleList = res.data
    },
    // 点击添加用户按钮弹出对话框
    addRoleList() {
      this.addDialogVisible = true
    },
    // 重置添加表单
    addDialogClosed() {
      this.$refs.addFormRef.resetFields()
    },
    // 添加角色对话框
    addRole() {
      this.$refs.editFormRef.validate(async valid => {
        if (!valid) return
        const { data: res } = await this.axios.post('roles', this.addForm)
        if (res.meta.status !== 201) {
          return this.$message.error('角色添加失败！')
        }
        this.$message.success(res.meta.msg)
        //   关闭对话框
        this.addDialogVisible = false
        //   刷新角色数据
        this.getRoleList()
      })
    },
    // 重置编辑角色表单
    editDialogClosed() {
      this.$refs.editFormRef.resetFields()
    },
    // 查询角色
    async showEditRoleList(id) {
      //   开启对话框
      this.editDialogVisible = true
      const { data: res } = await this.axios.get('roles/' + id)
      if (res.meta.status !== 200) {
        return this.$message.error('查询角色信息失败')
      }
      this.editForm = res.data
    },
    // 修改角色信息对话框
    editRoleInfo() {
      this.$refs.editFormRef.validate(async valid => {
        if (!valid) return
        const { data: res } = await this.axios.put(
          'roles/' + this.editForm.roleId,
          {
            roleName: this.editForm.roleName,
            roleDesc: this.editForm.roleDesc
          }
        )
        if (res.meta.status !== 200) {
          return this.$message.error('修改角色信息失败！')
        }
        this.$message.success('修改成功！')
        //   关闭对话框
        this.editDialogVisible = false
        //   刷新数据
        this.getRoleList()
      })
    },
    // 删除id
    async removeRoleList(id) {
      // 弹框询问用户是否删除
      const confirmResult = await this.$confirm(
        '此操作将永久删除该角色, 是否继续?',
        '提示',
        {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }
      ).catch(err => err)
      // 如果用户确认删除则返回字符串confirm
      if (confirmResult !== 'confirm') {
        return this.$message.info('已取消删除')
      }
      const { data: res } = await this.axios.delete('roles/' + id)
      if (res.meta.status !== 200) {
        return this.$message.error('删除用户是失败！')
      }
      this.$message.success(res.meta.msg)
      //   刷新角色列表
      this.getRoleList()
    },
    // 删除id对应的权限
    async removeRightById(role, rightId) {
      // 弹框提示用户是否要删除
      const confirmResult = await this.$confirm(
        '此操作将永久删除该文件, 是否继续?',
        '提示',
        {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }
      ).catch(err => err)

      if (confirmResult !== 'confirm') {
        return this.$message.info('取消了删除！')
      }

      const { data: res } = await this.axios.delete(
        `roles/${role.id}/rights/${rightId}`
      )
      if (res.meta.status !== 200) {
        return this.$message.error('删除权限失败')
      }
      this.$message.success(res.meta.msg)
      // this.getRoleList()
      // 只刷新权限列表
      role.children = res.data
    },
    // 展示分配权限对话框
    async showSetRightDialog(role) {
      this.roleId = role.id
      // 获取所有权限的数据
      const { data: res } = await this.axios.get('rights/tree')

      if (res.meta.status !== 200) {
        return this.$message.error('获取权限数据失败！')
      }
      // 把获取到的数据添加到data中
      this.rightsList = res.data
      // 将所有三级权限的id赋值到defKeys中
      this.getLeafKeys(role, this.defKeys)
      this.setRightDialogVisible = true
    },
    // 通过递归函数，获取角色权限下所有三级权限的id，并保存到defKeys数组中
    getLeafKeys(node, arr) {
      if (!node.children) {
        // 如果当前节点不包括children属性，则是三级节点
        return arr.push(node.id)
      }

      node.children.forEach(item => this.getLeafKeys(item, arr))
    },
    // 监听分配权限对话框的关闭事件
    setRightDialogClosed() {
      this.defKeys = []
    },
    // 点击为角色分配权限
    async allotRights() {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ]
      const idStr = keys.join(',')

      const { data: res } = await this.axios.post(
        `roles/${this.roleId}/rights`,
        {
          rids: idStr
        }
      )

      if (res.meta.status !== 200) {
        this.$message.error('分配权限失败！')
      }

      this.$message.success(res.meta.msg)
      this.getRoleList()
      this.setRightDialogVisible = false
    }
  }
}
</script>

<style lang="less" scoped>
.el-tag {
  margin: 7px;
}

.bdtop {
  border-top: 1px solid #eee;
}

.bdbottom {
  border-bottom: 1px solid #eee;
}

.vcenter {
  display: flex;
  align-items: center;
}
</style>
